Operating instructions PC-30-Vario filter control unit Page: 10
cables to prevent potential interference. The
solar temperature sensor should be fitted at
the solar collector output in good thermal
contact with the returning water flow. The
temperature at the installation position for the
temperature sensor must not exceed 80°C.
Frost protection
When the frost protection function is enabled,
the temperature sensor connected to terminals
32 and 33 is used as the air temperature
sensor for frost protection. Solar temperature
control is disabled when frost protection is in
use. In installations without solar heating, the
frost-protection sensor should be installed in a
suitable
position
outdoors.
Once
the
temperature at the temperature sensor drops
below 0°C (factory setting), the filter system is
activated. In this case, the temperature
controller regulates the heater to a target
temperature of 3°C.
Fuses
The electronic controller is protected by a 0.5A
microfuse located on the printed circuit board inside
the control unit. A separate 3.15A microfuse is
provided for each of the following devices: heater,
backwash valve, rinsing valve and solar actuator. The
customer must fit mains fuses of maximum rating 16A
to provide short-circuit protection for the filter pump.
ECO mode
(energy saving mode)
In this operating mode, the filter pump runs at
minimum speed. ECO mode can only be used
during the programmed filter operating periods.
It is activated by the ECO timer (during the
filter operating period), by the operating-mode
selector switch or by the cover limit-switch
(with the cover closed the pump runs at ECO
speed during the filter operating period).
Controller
Solar actuator and
internal interlocks
Heater
Backwash valve
Rinsing valve
